Hi Manfred, welcome.
You could have a look at https://community.openhab.org/t/yamaha-musiccast-binding-revival/57833
This binding is based on the Musiccast protocol which is in use by the newer models of Yamaha.
It will become available with OH3.3 if I’m not mistaken.
To answer your question : the only thing I could think of is that the old protocol is not working with these models. But I’m not sure.
